222406405 has 8 divisors (see below), whose sum is σ = 287417592. Its totient is φ = 164238528.

The previous prime is 222406367. The next prime is 222406411. The reversal of 222406405 is 504604222.

It can be written as a sum of positive squares in 4 ways, for example, as 31911201 + 190495204 = 5649^2 + 13802^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222406405 - 2¹³ = 222398213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222406405.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710754 + ... + 1710883.

It is an arithmetic number, because the mean of its divisors is an integer number (35927199).

Almost surely, 2^222406405 is an apocalyptic number.

It is an amenable number.

222406405 is a deficient number, since it is larger than the sum of its proper divisors (65011187).

222406405 is a wasteful number, since it uses less digits than its factorization.

222406405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3421655.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 222406405 is about 14913.2962486501. The cubic root of 222406405 is about 605.8741592258.

The spelling of 222406405 in words is "two hundred twenty-two million, four hundred six thousand, four hundred five".